Peter Duniho wrote:

You might hope it would. But knowing about the other plane has not in the
past always prevented accidents. I don't see why it always would in the
future.


The infamous case of a PSA B727 running over a C-172 under the hood at
San Diego comes to mind.

http://www.super70s.com/Super70s/Tech/Aviation/Disasters/78-09-25(PSA).asp

Despite this I think the odds are still better with a control tower,
however you still have to look!